BHT-212-MM-1
5-00-00
Page 214 Rev. 14 26 JUN 2013
Export Classification C, ECCN EAR99
1. Power plant.
a. Examine inlet screen for blockage.
Pratt & Whitney
Canada PT6T-3/-3B
Maintenance Manual
b. Inspect engine compressor region for salt, dust, oil, or
other contaminants. If contaminants are found, clean and
perform a power check in accordance with Pratt & Whitney
Canada PT6T-3/-3B Maintenance Manual.
c. Inspect for visible Foreign Object Damage (FOD) to
visible compressor blades.
Pratt & Whitney
Canada PT6T-3/-3B
Maintenance Manual
d. If compressor stall (surge) occurred during acceleration,
refer to Pratt & Whitney Canada PT6T-3/-3B Maintenance
Manual for inspection procedures.
Pratt & Whitney
Canada PT6T-3/-3B
Maintenance Manual
e. Perform test on pneumatic sense lines.
Pratt & Whitney
Canada PT6T-3/-3B
Maintenance Manual
f. If step a through step e do not reveal cause of surge,
perform a hot end inspection in accordance with Pratt &
Whitney Canada PT6T-3/-3B Maintenance Manual.
2. Power train.
a. If compressor stall occurs below 85% N1 (GAS PROD)
speed, comply with step b and step c.
b. Remove magnetic chip detectors from transmission,
intermediate gearbox, and tail rotor gearbox. Inspect for metal
particles.
c. If no evidence of damage is found on tailboom pylon
and no indication of metal particles are found on chip detectors,
clean chip detectors and reinstall. Return helicopter to flight
status and repeat chip detector inspection after 5 to 10
operating hours. If positive indication of damage is found on
tailboom pylon or metal chips are found on chip detectors,
during initial or 5 to 10 hour inspection, comply with the
following step e through step i.
d. If compressor stall occurs at 85% N
1
(GAS PROD) or
above, comply with the following step e through step i.
5-54. AFTER ENGINE COMPRESSOR STALL OR SURGE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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